.include "lib/macros.xyw"

.macro CR $0D PUTC

; Main program
print-clock JSRw
set-timer JSRw
end JMPw

.include "lib/putd.xyw"

; Print current time every second
; --
.label on-timer
  CR
  ; print current time
  print-clock JSRw
  ; reset timer
  set-timer JSRw
  RTS

; Set on_timer handler and start timer for 1 second
; --
.label set-timer
   ; reset on_timer handler
  on-timer clock.on_timer STW
  ; reset timer for 1 second
  $0100 clock.timer STW
  RTS

; Print current time in HH:MM:SS format
; --
.label print-clock
  clock.hour LDB
  ZEROPADx JSRw
  $3A PUTC
  clock.minute LDB
  ZEROPADx JSRw
  $3A PUTC
  clock.second LDB
  ZEROPADx JSRw
  RTS

; Print an 8bit integer as decimal, with leading zero if less than 10
; a8 -- | [x]
.label ZEROPADx
  POPx PSHx $0A LTH put-zero JCNw
  .label put-digit
    PSHx putd JSRw
    RTS
  .label put-zero
    $30 PUTC
    put-digit JMPw

.label end